Which two input devices offer a one-to-one mapping of buttons to letters in the alphabet?

You are creating a game that requires a large amount of text entry.
Which two input devices offer a one-to-one mapping of buttons to letters in the alphabet?
(Choose two.)

A.
Xbox 360 Chatpad

B.
Kinect

C.
PC keyboard

D.
Xbox 360 controller

E.
PC mouse

Explanation:
http://msdn.microsoft.com/en-us/library/bb975640.aspx

http://msdn.microsoft.com/en-us/library/gg680270(v=pandp.11).aspx